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What is LOPA

LOPA is a semi-quantitative risk analysis technique. Therefore it is a midway approach between HAZOP and a quantitative risk assessment (QRA) in terms of its rigorousness. This technique evaluates risks by orders of magnitude of the selected accident scenarios and builds on the information developed in qualitative hazard evaluation (e.g. PHA).  During a process hazards analysis (PHA), a team is responsible for assessing the process risk from various process deviations by determining the potential frequency and consequence of the incident. Plants are protected by various layers of protection: Plants are protected by various layers of protection: Pressure Relief Devices Flare Systems Fire Suppression Systems Safety Instru...
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